Horseshoe-nail.



AJW. KNIGHT. HORSBSHOE NAIL. APPLIOATLQN FILED JULY 12, 1912.

mj: nomas PETER: ca.. wasmzvnron, n. c

Patented Mar. 9, 1915.

ALFRED WILLIAM KNIGHT, OF LONDON, ENGLAND'.

HORSESHOE-NAIL.

Specification of Letters Patent.

Patented Mar. 9, 1915.,

Application filed July 12, 1912. Serial No. 709,070.

T0 all whom t may concern.'

Be it known that I, ALFRED WILLIAM KNIGHT, a subject of the King of Great Britain, residing at l Upper St. Martins Lane, London, lllngland, have invented new and useful improvements in .or Relating to HorseshoeNails, of which the following is a specification.

My invention relates to horse-shoe nails.

ln horse-shoe nails as now generally constructed it frequently happens'that the taper heads of the nails, when driven, are only tightly in contact with the shoe near the outer ends of the countersunk holes, so that when the shoe and the nails have become worn the nails do not hold the shoe tightly, the parts of the nails and shoe originally in contact being worn awa The main object of my invention is to so construct nails as to insure that the contact between the shoe and the nails shall be on all the sides of the countersunk holes near the hoof or inner side of the shoe, so that tight contact will be maintained even after the shoe has been considerably worn.

According to my invention the taper head of the nail instead of being adapted to entirely fill the countersunk hole in the shoe is rabbeted or partially out away at the outer end to shorten the head so as to allow of the remaining tapering portion entering the lower part of the countersunk hole, through which the nail is driven, and thereby gripping the shoe near to the inner end or bottom of the hole. The remaining portion of the head, which, I hereinafter refer to as the extension, projects to the outside of the hole and is preferably of about the thickness of the nail at its neck, this extension of the nail serving to receive the blows by which the nail is driven, and also, if made long enough to project beyond the surface of the shoe, acting as a roughing stud.

My invention will be readily understood by reference to the accompanying drawing, in which Figures l and 2 are elevations at rightangles to each other of a nail constructed accoi-ding to my invention, and Fig. 3 is a plan of the same.

a indicates the shank of the nail, b the. head of the same, and c the rabbet which serves to shorten the taper portion of the nail so as to insure the latter being driven into the inner end of the countersunk hole to obtain the tight grip hereinbefore referred to.

d is the extension.

In the drawing I have tion as applied to a nail of the kind described in the specification of British Letters Patent granted to me No. 28309/08 and wherein the shank is grooved on one side and made convex on the other; and with cutting rib edges toward the head; it is to be understood however, that my invention may be applied to nails provided with ordinary flat Shanks, or concavo-convex Shanks. It will also be noticed that the extension d is arranged centrally of the shank; this arrangement has special advantages as it insures the nail being Struck centrally with the shank, and therefore being driven with greater accuracy than frequently occurs with nails constructed with ordinary heads. The extension d is also preferably rounded at the end, as shown at c, to provide a practically central point against which the hammer will impinge.

As hereinbefore stated the extension al may be made of such length that a portion will project beyond the surface of the shoe and form a roughing or frost nail, and these extensions in the case of an iron nail may be case-hardened to resist wear, or hardened if steel. In order to prevent the liability of the extension breaking away from the head, the angle between the said extension and the head is preferably rounded, as shown at f in Fig. 2.

The rabbet c is not formed entirely across the face of the nail, webs g, g being left, thereby forming a recess for the point of the tool or buffer employed when wedging the head in the hole of the shoe, the said we ts also serving to stiften the head of the nai Nails with the heads constructed as hereinbefore described can be produced from lighter wire, rod or strip than heretofore, it being only necessary to employ a wire of the width of the nail at its greatest part, as the extension can be formed out of metal of the same size as that required for forming the taper part of the head. v

This construction is very advantageous when nails are made from blanks cut transversely from a broad rolled strip, as the reshown my invenso that the tapering head enters and `binds l0 against the inner end of the coiintersunk hole, said extension having reinforcing ribs on its sides.

ALFRED VILLAM KNIGHT.

Witnesses:

JOHN E. BoUsFiELD, C. Gr. REDFERN.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner o! Patents,

Washington, D. C. 

